How To Fix DMCLG442 - migration object &1; more than one header structure has been specified

SAP Error Message - Details

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 442

• Message text: migration object &1; more than one header structure has been specified

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message DMCLG442 - migration object &1; more than one header structure has been specified ?

  The SAP error message DMCLG442 indicates that there is an issue with the migration object where more than one header structure has been specified. This typically occurs during data migration processes, such as when using the SAP Data Migration Cockpit or other data transfer tools.
  Cause:
  The error arises when the migration object is incorrectly configured to include multiple header structures. In SAP data migration, a header structure is used to define the main attributes of a data record, and having more than one header structure can lead to ambiguity in how the data should be processed.
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Migration Object Configuration:
  
  Go to the transaction code used for managing migration objects (e.g., LTMC for the Migration Cockpit).
  Review the configuration of the migration object in question. Ensure that only one header structure is defined.
  
  
  
  Adjust the Data Mapping:
  
  If you are using a template or a predefined migration object, ensure that the mapping of fields is correct and that it adheres to the expected structure.
  If necessary, modify the data mapping to ensure that it aligns with the single header structure.
  
  
  
  Review the Data File:
  
  If you are uploading data from a file (e.g., CSV), check the file format to ensure that it does not inadvertently include multiple header rows or structures.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for the specific migration object you are working with. This can provide insights into the expected structure and any constraints.
  
  
  
  Test with Sample Data:
  
  Create a small sample dataset that adheres to the expected structure and test the migration process to ensure that it works without errors.
  
  
  
  Seek Help from SAP Support:
  
  If the issue persists after checking the configuration and data, consider reaching out to SAP support for further assistance. They may provide insights specific to your version or configuration.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LTMC (Migration Cockpit) and LTMOM (Migration Object Modeler) for managing migration objects.
  SAP Notes: Check for any SAP Notes related to the specific migration object you are using, as they may contain fixes or workarounds for known issues.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  By following these steps, you should be able to identify and resolve the DMCLG442 error effectively.